US PATENT SUBCLASS 280 / 431
.~.~.~.~ Landing gear and coupling interlock

Current as of: June, 1999
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280 /   HD   LAND VEHICLES

29  DF  WHEELED {21}
400  DF  .~ Articulated vehicle {30}
423.1  DF  .~.~ Semitrailer {7}
427  DF  .~.~.~ Interrelated operation of coupling, landing gear, and brake {3}
431.~.~.~.~ Landing gear and coupling interlock

DEFINITION

Classification: 280/431

(under subclass 427) Devices in which the coupling means between the vehicles is provided with a latch or lock, the latch and landing gear being so related that the vehicles cannot be uncoupled unless the landing gear is extended and/or the landing gear cannot be retracted before the vehicles are coupled together.

SEE OR SEARCH THIS CLASS, SUBCLASS:

429+, for trailer landing gear which is extended and/or retracted by the action of coupling and uncoupling the vehicles.